International security, also called global security, refers to the amalgamation of measures taken by states and international organizations, such as the United Nations, European Union, Association of Southeast Asian Nations, and others, to ensure mutual survival and safety. These measures include military action and diplomatic agreements such as treaties and conventions. International and national security are invariably linked. International security is national security or state security in the global arena.

International Security is a peer-reviewed academic journal in the field of international and national security. It was founded in 1976 and is edited by the Belfer Center for Science and International Affairs at Harvard University and published four times a year by MIT Press, both of Cambridge, MA.